What is this stuff growing on my rocks?

[Sunny]

I have noticed these hair like things growing on my rocks. If it was green I would have said that it is green hair algae. These are not green but white.

Is there something called white hair algae? Look at this image. These don't look like aptesia to me.

What are these?

 

[john90009]

eh who knows it does nothing bad its all over my rocks where theres little flow- it helps collect dust in the tank to make them longer tho

 

[Sunny]

Anyone?

 

[Hawkeye]

tagging - i get those also on my LR...not as clustered like your pic - a few here or there. A stiff brush and a siphon will remove them. I don't bother as they do not seem to be growing to plague proportions.

 

[Dave]

FWIW - I get these as well. My tang picks at them. I see it as the diversity of life in my tank, and have not worried about it.

 

[JRWOHLER]

I am with everyone else, I have them and they seem to be harmless.

 

[Boomer]

I'm checking on this